(19)
(11) EP 4 254 852 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
20.12.2023 Bulletin 2023/51

(43) Date of publication A2:
04.10.2023 Bulletin 2023/40

(21) Application number: 23192198.2

(22) Date of filing: 04.12.2013
(51) International Patent Classification (IPC): 
H04L 5/00(2006.01)
H04W 72/21(2023.01)
 H04W 76/28(2018.01)
(52) Cooperative Patent Classification (CPC):
H04L 5/0051; H04W 76/28; H04L 5/0057; H04W 72/21; Y02D 30/70; H04W 16/14
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30) Priority: 20.03.2013 EP 13160199

(62) Application number of the earlier application in accordance with Art. 76 EPC:
21160396.4 / 3852468
19212244.8 / 3634064
18180846.0 / 3416443
17153572.7 / 3179808
13801555.7 / 2976923

(71) Applicant: Sun Patent Trust
New York, NY 10022 (US)

(72) Inventors:
  • LÖHR, Joachim
    63225 Langen (DE)
  • SUZUKI, Hidetoshi
    Osaka, 540-6207 (JP)
  • BASU MALLICK, Prateek
    63225 Langen (DE)

(74) Representative: Grünecker Patent- und Rechtsanwälte PartG mbB 
Leopoldstraße 4
80802 München
80802 München (DE)

   


(54) DETERMINISTIC UE BEHAVIOUR FOR CSI/SRS REPORTING DURING DRX


(57) The invention relates to a method for transmitting a periodic channel quality report (CSI) and/or a sounding reference symbol (SRS) from a UE to an eNodeB. To avoid double decoding at the eNodeB in transient phases, a deterministic behavior of the UE is defined by the invention, according to which the eNodeB can unambiguously determine whether the UE will transmit the CSI/SRS or not. According to one embodiment, the UL grants and/or DL assignments received until and including subframe N-4 only are considered; UL grants and/or DL assignments received by the UE after subframe N-4 are discarded for the determination. Additionally, DRX-related timers at subframe N-4 are considered for the determination. In a second embodiment, DRX MAC control elements from the eNodeB, instructing the UE to enter DRX, i.e. become Non-Active, are only considered for the determination if they are received before subframe N-4, i.e. until and including subframe N-(4+k).







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